<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>条件渲染</title>
</head>
<body>
<div id="div">
    <!-- 判断num的值，对3取余
        余数为0显示div1
        余数为1显示div2
        余数为2显示div3 -->
    <div v-if="num % 3 == 0">div1</div>
    <div v-else-if="num%3==1">div2</div>
    <div v-else>div3</div>


    <div v-show="flag">div4</div>

</div>
</body>
<script src="vue-2.6.12.js"></script>
<script>
    new Vue({
        el:"#div",
        data:{
            num:1,
            flag:false
        }
    });
</script>
</html>